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Incidence and indications for revision cochlear implant surgery in adults and children.
Laryngoscope. 2009 Jan; 119(1):152-7.L

Abstract

OBJECTIVES/HYPOTHESIS

To identify the incidence of and common causes for cochlear implant revision.

STUDY DESIGN

Retrospective case series.

METHODS

Operative records were reviewed for all cases of revision cochlear implantation from 1992 to 2006. The causes for reimplantation were classified as hard device failure, soft device failure, exposure/infection, receiver/stimulator migration, and electrode migration. Manufacturers' failure analysis of explanted devices was likewise determined.

RESULTS

Eight hundred and six cochlear implants were performed during the study period including 44 (5.5%) revision procedures. The revision rate was 7.3% for children and 3.8% for adults and reached statistical significant difference. The most common reasons for revision were device failure (78%; 55% hard failure, 23% soft failure) followed by electrode migration (9%) and receiver/stimulator migration (7%). Manufacturers' analysis of failed devices revealed loss of hermetic seal and cracked cases to be the most common causes of failure. Bench analysis of 5/10 explanted devices that were soft failures demonstrated identifiable device defects.

CONCLUSIONS

Revision cochlear implant surgery is an infrequent occurrence. Its incidence appears to be higher in children than in adults, although in this series does not appear to be due to increased wound complications, infections, or trauma. Explanted implants that have soft failure as the etiology may have demonstrable defects on bench testing.

Authors+Show Affiliations

University of Miami Ear Institute, Miami, Florida, USA. kbrown3@med.miami.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19117299

Citation

Brown, Kevin D., et al. "Incidence and Indications for Revision Cochlear Implant Surgery in Adults and Children." The Laryngoscope, vol. 119, no. 1, 2009, pp. 152-7.
Brown KD, Connell SS, Balkany TJ, et al. Incidence and indications for revision cochlear implant surgery in adults and children. Laryngoscope. 2009;119(1):152-7.
Brown, K. D., Connell, S. S., Balkany, T. J., Eshraghi, A. E., Telischi, F. F., & Angeli, S. A. (2009). Incidence and indications for revision cochlear implant surgery in adults and children. The Laryngoscope, 119(1), 152-7. https://doi.org/10.1002/lary.20012
Brown KD, et al. Incidence and Indications for Revision Cochlear Implant Surgery in Adults and Children. Laryngoscope. 2009;119(1):152-7. PubMed PMID: 19117299.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Incidence and indications for revision cochlear implant surgery in adults and children. AU - Brown,Kevin D, AU - Connell,Sarah S, AU - Balkany,Thomas J, AU - Eshraghi,Adrien E, AU - Telischi,Fred F, AU - Angeli,Simon A, PY - 2009/1/2/entrez PY - 2009/1/2/pubmed PY - 2009/4/1/medline SP - 152 EP - 7 JF - The Laryngoscope JO - Laryngoscope VL - 119 IS - 1 N2 - OBJECTIVES/HYPOTHESIS: To identify the incidence of and common causes for cochlear implant revision. STUDY DESIGN: Retrospective case series. METHODS: Operative records were reviewed for all cases of revision cochlear implantation from 1992 to 2006. The causes for reimplantation were classified as hard device failure, soft device failure, exposure/infection, receiver/stimulator migration, and electrode migration. Manufacturers' failure analysis of explanted devices was likewise determined. RESULTS: Eight hundred and six cochlear implants were performed during the study period including 44 (5.5%) revision procedures. The revision rate was 7.3% for children and 3.8% for adults and reached statistical significant difference. The most common reasons for revision were device failure (78%; 55% hard failure, 23% soft failure) followed by electrode migration (9%) and receiver/stimulator migration (7%). Manufacturers' analysis of failed devices revealed loss of hermetic seal and cracked cases to be the most common causes of failure. Bench analysis of 5/10 explanted devices that were soft failures demonstrated identifiable device defects. CONCLUSIONS: Revision cochlear implant surgery is an infrequent occurrence. Its incidence appears to be higher in children than in adults, although in this series does not appear to be due to increased wound complications, infections, or trauma. Explanted implants that have soft failure as the etiology may have demonstrable defects on bench testing. SN - 1531-4995 UR - https://www.unboundmedicine.com/medline/citation/19117299/Incidence_and_indications_for_revision_cochlear_implant_surgery_in_adults_and_children_ L2 - https://doi.org/10.1002/lary.20012 DB - PRIME DP - Unbound Medicine ER -